Raytheon Company

Electronic Design & Development, Corp.

Joel Blumke

Kevin W Patrick

Sergio E Cardona, Jr

Silvio Cardero

Marwan M Krunz

Ralston S Robertson

Jeremy Bart Baldwin

Lawrence Wayne Tiffin

David W Baker

Milton E Cardona

Chester Lo

Kevin G Ehrichs

Ray Soloman Skaggs

Samuel F Frey

Christian Maldonado-Echevarria

Thomas G Subiti

David J Karasiewicz

Waveguide antennas and corresponding manufacturing methods are described herein. These include dual-linear antennas. These dual-linear antennas provide efficient transmission and reception of two radio-frequency signals that may be polarized in orthogonal orientations. The electrically conducting features within the dual-linear antenna are manufactured using standard printed circuit board (PCB) manufacturing technology. The final outer form of the dielectric waveguide antenna may be machined by turning on a lathe or similar mechanical technique, cast in a mold, or injection molded, and the final outer form is accurately aligned and registered to the radio-frequency features of the PCB. The dual-polarized antenna device may include multiple pairs of parallel slot antennas fabricated within a planar printed circuit.

Dual-polarized antennas

A three-dimensional, 360 degree, omnidirectional multiple-input multiple-output wireless systems is described herein. The multiple-input multiple-output wireless system is comprised of a plurality of radio inputs, a plurality of radio-frequency converters, an RF signal distribution network, a plurality of transceivers, and a plurality of antennas. The multiple-input multiple-output wireless system may further have a plurality of planar stacks.

Active distributed antenna system with frequency translation and switch matrix

3D 360 degree omnidirectional MIMO

A noise reduction filter is inserted between the source and non-linear transmission line (NLTL) in a frequency multiplier to improve phase noise performance. The noise reduction filter is suitably coupled directly to the input of the NLTL. The noise reduction filter and the output BPF are suitably low complexity filters.

Noise reduction for non-linear transmission line (NLTL) frequency multiplier

Coupling between non-adjacent resonators and wave propagation through the waveguide structure in distributed EM filters are reduced by forming one or more holes in one or more of the resonators (planar or folded) and by passing a conductive structure through each hole normal to the resonator. The conductive structures (vertical vias or horizontal strips) are preferably grounded, either by direct connection or capacitive coupling to one or more ground planes or by creation of a virtual ground. The holes are spaced apart from the edges of the resonator so as to minimize any interference with the current and fields concentrated at the edges of each resonator. These conductive structures narrow the effective cavity width 'a' for the waveguide as a whole and between non-adjacent resonators without affecting the cavity width 'a' between adjacent resonators. Consequently the conductive structures have no effect on the desired coupling between adjacent resonators and the desired filter response of parallel-coupled filters while increasing the attenuation of the wave propagating in the waveguide and the attenuation of the wave coupled between non-adjacent resonators.

Ground structures in resonators for planar and folded distributed electromagnetic wave filters

Provided is a non-federated multi-function exciter. The non-federated multi-function exciter includes a waveform generator subsystem operable to provide waveforms programmable in time, duration, slope and frequency. A transmission subsystem is coupled to the waveform generator, the transmission subsystem having a first upconverter and a second upconverter coupled to the first upconverter. A communication modulation subsystem is coupled to the second upconverter of the transmission subsystem. A reference clock subsystem coupled to the waveform generator subsystem, the transmit subsystem and the communication modulation subsystem. The non-federated multi-function exciter is operable to generate interleaved radar and communication signals.

Non-federated multi-function Ka-band exciter system and method

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Tucson, AZ, United States of America

Joel Blumke